Safety window lock



March 23, 1954 Filed Sept. 11, 1952 A. N. NELSON SAFETY WINDOW LOCK 2Sheets-Sheet l INVENTOR.

March 23, 1954 NELSON 2,673,106

SAFETY WINDOW LOCK Filed Sept. 11, 1952 2 Sheets-Sheet 2 JTTOR/VE YPatented Mar. 23, 1954 UNITED STATES PATENT OFFICE 6 Claims.

This invention relates to a safety window lock device.

It is an object of safety window lock applied to a window the inventiontoprovide a device which can be easily frame and locked with theportions thereof and with the window elements so that the windowelements can be prevented from being raised or lowered and held againstfurther opening movement relative to each other, should an attempt bemade by an intruder to enter the household through the window openingand wherein the user of the window lock can be assured of fresh aireither at night or during the day with security and without the feelingthat the window may permit the entry of another person.

Another object of the invention is to provide a safety window lockdevice which can be applied to the window frame parts .in such a manneras not to interfere with the window sash cord or chain and wherein thelock, while ertending over the sash cord, is open at the top and at thebottom to accommodate the sash cord or chain and wherein the lock ismade secure to the window frame by engagement with vertical guides orrunners that accommodate the movable window elements.

It is another object of the invention to provide a safety window lockdevice which is adapted to be secured to the window frame in a manner tofix the lower window element against upward movement therein andwhichhas associated with it auxiliary locking means engageable with theupper window element to prohibit relative movement between the upperwindow element and the lower window element once the upper windowelement has been lowered below the upper edge of the lower windowelement.

It is another object of the invention to provide a safety window lockdevice which can be easily set at different positions along the runnersof the window frame and in which the locking parts are forced intogripping engagement with the runners and the upper window element by acommon setting and releasing means extending between the locking partsand wherein the common means has a member engageable by the lower windowelement to cause the additional gripping of the locking parts as anattempt is being made to raise the lower window element.

Other objects of th invention are to provide a safety window lock devicehaving the above objects in mind which is of simple construction,inexpensive to manufacture, easy to install upon the window frame andengage with the window elements, has a minimum number of parts, is

compact, durable and rugged, of pleasing appearance, light in weight andefficient in operation.

For other objects and for a better understanding of the invention,reference may'be had to the following detailed description taken. inconnection with the accompanying drawing, in which Fig. 1 is afragmentary perspective view of a window frame with window elementsslidable therein and of the window lock device constructed according toone form of the present invention,

Fig. 2 is a top plan view of the form of the device shown in Fig. 1,

Fig- 3 is a vertical sectional view of the device shown in Fig. 1 takenon line 3-3 thereof,

Fig. 4 is a fragmentary rear elevational view of the lower portion ofthe device shown in Fig. 1,

Fig. 5 is a collective and perspective view of the parts of the deviceshown in Fig. 1,

Fig. 6 is a perspective view of a modified locking device similar to theform of the invention shown in Fig. 1 but having crossed window lookingparts that are engageable with the upper window element,

Fig. 7 is a fragmentary and sectional view taken generally on line 1-1of Fig. 6 and through the upper window locking parts,

Fig. 8 is a front elevational view of another modified form of theinvention in which common means are employed for effecting the settingand releasing of the locking parts,

Fig. 9 is a perspective and collective view of the parts of the deviceconstructed according to the form of the invention shown in Fig. 8.

Referring now to the form of the invention shown in Figs. 1 to 5, l5represents a rectangular-shaped main body plate to which there is fixeda locking part l6 of angle section as by means of spot welding andhaving a flange l1 adapted to engage with a vertical runner or guide I8of a window frame 19. The locking part It has a flange 2B which avertically-adjustable slide 22 is adjusted. This adjustable slide 22 hasan inclined edge 23 engageable with ing part 16 and a runner-engagingflange 24 with protrusions 25 that engage an inner runner 26 of thewindow frame 19. The body plat l5 has an inclined elongated slot 21through which extends a threaded bolt 28 having fastening knob 29. Assoon as the adjustable slide 22 is moved along the fixed element I6 tofix the device be-' tween the runners l8 and 2B, the fastening knob 29can be tightened upon the threaded bolt 28 to fix the device between therunners l8 and 28.

with an inclined edge 2 over the inclined edge 2| of the lock- Thedevice is placed above the lower window element 30 so that a dependingSlide or wedge 3| rests upon the top edge of the window element 30. Theslide or wedge 3| has an upwardly-extending tapered wedge portion 32having guide rivets 33 and 34 slidable in a vertical slot 35 in thelower part of the main body plate I5. The slide or wedge El has a notch36 therein to accommodate sash cord 31.

The slide 22 has an opening 23 for receiving the threaded bolt 28, Fig.5. The plate l has openings 31 and 38 for receiving respectively pins 39and it that respectively hingedly and swingably secure runner engagingarms il and A2 to the plate l5. These arms respectively have pointedends 43 and Ml that are adapted to penetrate the sides of the respectiverunners |8 and 26. These swingable runner-engaging arms ll and 42 alsorespectively have side edges 45 and 45 adapted to be worked by the wedgeportion 32 of the slide or wedge 3| so that as the window element 30 israised, the window engaging element 3! is forced upwardly, guided bypins 33 and 3d and the slot 35 and by the wedge portion 52 with the edge45 and iii; of the swingable runner-engaging arms ll and 42, the runnerengaging arms are expanded outwardly to increase the grip of the devicewith the runners at times when force is applied to raise the lowerwindow element 30. The greater the upward force on the window element3|], the greater the gripping action of the swingable runner-engagingarms di and t2. If, however, the arms ii and 42 should slip, the plate20 would slide up and the fixed locking part would force outwardlyadjustable slide 22 and protrusions 25 whereby to increase the grippingen-' gagement of the device with runners i8 and 2t.

When it is desired to release the loci: device from the window frame,the fastening knob 29 is loosened on the threaded bolt 28 and elevatingadjustable slide 27.. By an upward pull of the device the pointed endsit; and M of the runner-engaging arms and 62 will be readily and quicklyreleased. in an equally similar and simple manner, the window lockdevice can be installed upon the window frame between the verticalrunners and astraddle the sash cord 31. The device can be used on eitherside of the window frame.

Referring n w particularly to Figs. 6 and 7, there is shown anadditional arrangement that is applied to the body plate Us for thepurpose of gripping an upper window element 5|. This arrangement isindicated generally at 52 and comprises two crossed gripping arms 53 and54 pivotally connected to a pivot pin 55 projecting outwardly from themain body plate l5. These gripping arms have respectively handleportions 58 and 51 which can be squeezed to release the grippingelements from the upper window member 5| and to swing them into registrywith each other against the action of spring 58, which tends to keep theelements 53 and 5t separated for engagement with the window element St,and in order to locate the arms upon the upper window element 5| as thedevice is being installed in the window frame and to release the devicefrom the frame. This form of the invention may readily be adapted to beused on either side of the window frame.

The gripping arms 53 and 54 can be squeezed at times when the same areto be placed in engagement with the upper window element 5|. Theymay beput into gripping engagement with the window element with one up and theother 4 down, in the manner as shown in Fig. 6, so that the movement ofthe upper window element 5| either up or down will be resisted by thegripping elements. The window elements have serrated hard rubberformations 53' and 54' on their ends to provide good gripping engagementwith the window element 5|. The gripping element 54 will prevent thedownward movement of the window element 5| while the gripping element 53will prevent upward movement of the window member 5|. The window member51 may be worked to properly position the gripping arms 53 and 54 uponthe side of the window member. The window member is retained between therunner l8 and a runner 59. Stop pins to and Bil on the plate |5 keep thegripping arms 53 and 54 from spinning freely but are far enough apart toallow the gripping arms to move to their holding positions.

Referring now particularly to Figs. 8 and 9, there is shown a stillfurther form of the invention. In this form of the invention commonoperating means can serve to operate the several engaging elements. Amain body plate 5| supports the various parts of the device. This bodyplate has a stationary gripping member 62 with an inclined edge @3. Thisstationary member can be fixed to the plate 6| by welding or by anyother suitable means and has a flange 54 which engagesvertically-extending runners of the window frame. Cooperating with andadjustable upon the inclined edge of the stationary member 5| is anadjustable gripping member 65. This adjustable member 65 has a'hole 55for a fastening screw 61 that extends through an inclined elongated slotEl in the plate 6|. This same screw 51 passes also through elongatedslot 68 in one end of a pivot lever '69 which is secured by a pivot pinIt passing through a hole H of the lever 69, a hole 12 of the stationarygripping member 62 and through a hole l3 of the plate 6|. This rivet isheaded on both ends to secure the assembly together. As a fastening nut15 is made fast upon the screw 51, the lever 69 is held upon the rearface of an adjustable gripping member (55, and the adjustable grippingmember is frictiona'lly locked in its adjusted position with itsinclined edge 65' on inclined edge 63 of the stationary gripping member52 and to the rear face of the supporting plateSl The adjustablegripping member 65 is moved in and out in the manner set forth in thedescription of the other forms of the invention, and it has a flange itthat will engage the vertical runner 26. The flanges 54 and 16 therebyfix the device to the runners.

Connected to the lower part of the plate 6| for vertical slidingmovement, is a wedge member 18' having a horizontally-extending porti nI9 engageable with the top edge of the lower window element 38 and awedge portion 8| having spaced guide pin projections 83 and 84. The pinprojections 83 and 84 work in the elongated slot 82 in the bottom of theplate 6|. At the respective opposite sides of the wedge portion 8| ofthe wedge member 78 are respectively laterallyswingable gripping arms 85and 86 respectively pivoted on pins 81 and 88 fitting respectively holes89 and 90 in the plate 6|. These pins 81 and 8 are headed in order tofix the gripping.

arms 85 and 86 against displacement on the plate 6|.

The lever 69 has an elongated slot 9| which receives a pin 92 on anL-shaped operating link 93, the lower edge of which may be fixed bywelding to the top edge of the wedge shaped portion 8| of the wedgemember'18. As the lever 69 is pivoted in a clockwise manner and liftedby the knob fastening nut 75 which lifts the adjustable gripping member65, the wedge member 18 is depressed to allow the gripping arms 85 and86 to be retracted and out of engagement with the runners 2t and I8.

Pivotally connected to the upper part of the plate 6| by a pin 95 is apivotal grip element 96 having a serrated rubber engaging portion 91 andan arcuate slot 98 receiving a threaded pin projection 99 of theL-shaped link member 93 which also extends through vertically-extendingelongated guide slot 100-. A coil spring l! surrounds the pivot pin 95and serves to urge the grip element 96 toward the upper window memberwhen the device is in place in the window frame.

A thumb-nut I02 is threaded upon the threaded projection 99 of the link93 and when tightened thereupon will lock the gripping element 96 inplace and in engagement with the upper window member 5|. With thethumb-nut m2 loosened and also the fastening nut 15 loosened, thefastening nut 15 can be elevated to simultaneously lift the adjustablemember 65.

The lever 69 can in turn work the link 93 to force downwardly orupwardly the bottom wedge member 18. The gripping element 96 can beadjusted independently of the L-shaped member 93. A knob I04 can be usedwhen adjusting the L-shaped member 93. A saddle strap I05 extends overthe L-shaped member and is fixed to the plate 6 I to guide the L-shapedmember 93.

It should now be apparent that there has been provided a safety windowlock which has adequate gripping and engaging elements to effect theholding down of the lower window and also the upper window memberagainst movement within the window frame and relative to the lowerwindow member. It should also be apparent that there has been provided acommon means for operating all of these gripping elements by a singleadjustment of a hand knob which is connected to a lever and the lever inturn connected to a link or L-shaped member that operates with theseveral gripping elements.

It should also be apparent in all of the forms of the invention that anytendency of movement of one of the window elements increases thegripping action of the gripping arms.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within th spirit and scope ofthe present invention as defined by the appended claims.

What i claimed is:

1. A safety window lock device comprising a main body plate, astationary gripping element of angle section fixed to the rear of saidplate, said gripping element having a flange extending perpendicular tothe plate and adapted to engage with a runner of a window frame andanother flang having an inclined edge, said main plate having aninclined elongated slot, an adjustable gripping element of angle sectionhaving a flange extending perpendicular to the plate and engageable withan opposite runner of the window frame and another flange having aninclined edge adapted to cooperate with the inclined edge of thestationary gripping element and slidable thereover whereby the devicemay be adjusted to a window opening, operating knob means connected tothe adjustable gripping element and adjustable to fix the grippingelement against the rear face of the main plate when in the adjustedposition, the perpendicular flanges of the gripping elements serving tospace the main body plate from the window frame and to allow for thepassage of a sash cord behind the window lock, and means on the lowerend of the main plate adapted to lie in the path of a horizontal sectionof a window member slidable between the runners of the window frame. 2.A safety window lock comprising a main plate, gripping elements ofangular section and having flanges with inclined edges, edges of the.respective gripping elecooperating with one another to effect grippingaction of the gripping elements upon runners of a window frame, one ofsaid grippin elements being fixed to the main plate and the other ofsaid grippingelements being adjustably secured to the main plate, awedge member vertically adjustable on the lower part of the main platehaving oppositely opposed inclined side edges and a horizontal normallyprojecting portion adapted to be engaged by a window member, andlaterally swingable gripping elements pivotally connected to the mainplate engageable with the oppositely inclined edges of the verticallyslidable wedge member and adapted when engaged with pressure by thewedge member to be swung outwardly into tight engagement with the windowframe runners.

3. A safety window lock device comprising a main body plate, grippingelements connected to the main body plate and adjustable relative toeach other to fix the device between vertically extending runners of awindow when fixed between the runners of a window frame serving toprevent the displacement of a window member, further gripping meanscomprising crossed gripping cam elements extending laterally to engagewith another window member and respectively having handle portions tobring the elements into registry with one another, pivot pin meanssecuring said gripping elements to the main plate and spring meansurging the separation of the gripping cam elements.

4. A safety window lock device comprising a main supporting plate,gripping elements having inclined edges operable with one another toeffect the lateral adjustment of one of the gripping elements relativeto the other, one of the gripto the supporting plate and having a flangeextending perpendicularly with a runner of a window frame, and the otherof said gripping elements being adjustably connected to the supportingplate for lateral adjustment with respect to the fixed gripping elementand to the supporting plate, said adjustable gripping element having anengaging flange extending perpendicular to the supporting plateengageable with the opposing vertical runner of the window frame,laterally swingable gripping elements pivotally connected in the lowerpart of the supporting plate and expandable outwardly for engagementwith the respective opposing runners of the window frame, an operatingmember having oppositely inclined edges respectively engaging thelaterally swingable gripping elements and having a horizontal portionwhich is engageable by a window member whereby as the window member isurged upwardly, the laterally swingable gripping elements will be urgedto a greater extent into the runners of the vertical frame, and commonmeans on the supporting plate and extending between the adjustableelement and the operating member for "the laterally swingable grippingelements whereby the first mentioned gripping elements and the laterallyswingable elements can be simultaneously released from the verticalrunners of the frame.

5. A safety window lock device comprising a main supporting plate, afixed gripping member secured to the plate and of angle section with oneflange extending perpendicularly to the plate and engageable with avertical runner of a window frame and the other flange having aninclined edge, an adjustable gripping member of angular section having aflange extending perpendicular to the plate and another flange having aninclined edge opposing the inclined edge of the fixed gripping memberand adjustable thereover, means connected to the adjustable grippingmember and engageable with the supporting plate to adjust the adjustablegripping member into engagement with an opposite vertical runner of thewindow frame and for fixing the adjustable member to the supportingplate when in its adjusted position, a lever pivoted upon the supportingplate and operable by the means for adjusting the adjustable grippingmember, a link pivotally connected to the opposite end of the lever,laterally swingable gripping elements pivotally connected to the lowerend of the supporting plate, and an operating member for the laterallyswingable gripping elements 1 having opposite inclined edgesrespectively engaging the laterally swingable gripping elements toexpand the same upon engagement of a window member with the operatingmember so as to force the laterally swingable gripping elements intogreater engagement with the vertical runners as movement of the windowmember is attempted, said link engageable with the operat ing member forthe laterally swingable grip ing elements.

6. A safety window lock device comprising a main supporting plate, afixed gripping member secured to the plate and of angle section with oneflange extending perpendicularly to the plate and engageable with avertical runner of a win- 4 dow frame and the other flange having aninclined edge, an adjustable gripping member of pendicular to the plateand another flange having an inclined edge opposing the inclinededge ofthe fixed gripping member and adjustable thereover, means connected tothe adjustable gripping member and engageable with the supporting plateto adjust the adjustable gripping member into engagement with anopposite vertical runner of the window frame and for fixing theadjustable member to the supporting plate when in its adjusted position,a lever pivoted upon the supporting plate and operableby the means foradjusting the adjustable gripping member, a link pivotally connected tothe opposite end of the lever, laterally swingable grip ing elementspivotally connected to the lower end of the supporting plate, anoperating member for the laterally swingable gripping elements havingopposite inclined edges respectively, engaging the laterally swingablegripping elements to expand the same upon a window member engageablewith the operating member so as to force the laterally swingablegripping elements into greater engagement with the vertical runners asmovement of the window member is attempted, said link engageable withthe operating member for the laterally swingable elements, and a furthergripping element pivotally connected to the upper part of the supportingplate and extending laterally thereof for camming engagement with anupper window member and said link extend- 7 ing upwardly and pivotallyconnected to said camming gripping element whereby all of the grippingelements on the supporting plate may be simultaneously released upon therelease of the adjustable inclined edge gripping member.

ALFRED N. NELSON.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 405,319 Nageborn June 18, 1889 413,362 Dempsey 'Oct. 22, 18891,759,707 Paddock May 20, 1930 1,857,958 Huss May 10, 1932 2,556,720Foley June 21, 1951

